Apparatus for fabricating tubular stock



Nov. 26,- 1963 H. HILDEBRAND APPARATUS FOR FABRICATING TUBULAR STOCK 1o Shets-Sheet 1 Filed June 13. 1960 INYENTOR. gARRY L HILDEBRAND 10 Sheets-Sheet 2 FIG. 2.

H. L. HILDEBRAND APPARATUS FOR FABRICATING TUBULAR STOCK Nov 26, 1963 Filed June 13, 1960 mm HARRY L. HILDEBRAND BY (5M,

ATTORNEYS Nov 26, 1963 H. L. HILDEBRAND APPARATUS FOR FABRICATING TUBULAR STOCK 10 Sheets-Sheet 5 Filed June 13, 1960 INVENTOR. HARRY L. HILDEBRAND y (5 2 M k-i ATTORNEYS N 63 H. HILDEBRAND 3,112,084

APPARATUS FOR FABRICATING TUBULAR STOCK Filed June 13, 1960 10 Sheets-Sheet 4 INVENTOK HARRY L. HILDEBRAND BY ATTORNEYS .Nov. 26, 1963 H. L. HlLDEBRAND APPARATUS FOR FABRICATING TUBULAR STOCK Filed June 13, 1960 10 Sheets-Sheet 5 INVHVTOR. HARRY L. HILDEBRAND BY I ATTORNEYS 1963 H. L. HILDEBRAND 3,112,084

APPARATUS FOR FABRICATING TUBULAR STOCK Filed June 13, 1960 10 Sheets-Sheet 6 Vim O I74 no I380 9 264266 v FIG. 8. MENTOR;

HARRY L. HILDEBRAND BY 6W1) MH4HM% ATTORNEYS 1963 H. HILDEBRAND 3,112,084

APPARATUS FOR FABRICATING TUBULAR STOCK Filed June 15, 1960 10 Sheets-Sheet 7 IO l6 l 26 l 22 I] II t 4 1 -FIG. 9. 5 F i x I L '9 i 34 i 26 36 i 22 32 I; ll 30 o I -82 1H!lllillllHIILIIIIUIIHIIIITLHEHE I I 80 INVENTOR. HARRY L. HILDEBRAND ATTORNEYS Nov. 26, 1963 H. HILDEBRAND APPARATUS FOR FABRICATING TUBULAR STOCK l0 Sheets-Sheet 8 Filed June 13. 1960 FIG. I0.

-I :I I Im lllilllllllllll m j m H l 0 H w u m i qw l lawn u w FL INVENTOR. HARRY L. HILDEBRAND BY W1.

ATTORNEYS mm \lllllllllllllll FIG.

Nov. 26, 1963 H. L. HILDEBRAND APPARATUS FOR FABRICATING TUBULAR STOCK 1O Sheets-Sheet 9 m 0 m Hhfi NR H w k x x Q 3N m. \\\\\\\R 8N 0mm l 1 mm MQN ONN .VN 9% 8m 8 NNN HARRY L. HILDEBRAND wmm ATTORNEYS United States Patent 3,112,684 AIIARATUS FUR FA RICA'IING TUBULAR STUCK Harry lL. Hildebrand, Norristown, Pa, assignor to Taylor Corporation, a corporation of Delaware Filed June I3, 1959, Ser. No. 35,552 3 Elaims. (Cl. 2 t-2-6) This invention relates generally to the fabrication of tubular stock, and particularly to improvements in apparatus for fabricating a laminated tubular member from a single Web of sheet material treated with resins or similar substances.

An object of the present invention is to provide such apparatus with means for automatically feeding sheet material from a supply roll thereof to a mandrel about which a length of the material is to be wound to form a laminated tubular member.

Another object is to provide such apparatus with means for drawing said sheet material from the supply roll and automatically responsive to the progressively changing size of the latter for maintaining uniform tension on the section of sheet material extending from the supply roll to the mandrel about which it is being wound.

Another object of the invention is to provide such apparatus with means for automatically severing the section of sheet material out of which the tube is being formed from the supply roll and terminating the winding operation when the tube is of a predetermined outside diameter.

Another object is to provide such apparatus with roller means operable for engaging a resin-coated surface of said material and winding said sheet material about said mandrel, and with scraper means for continuously maintaining a surface of said roller means free from resin deposited thereon by said sheet material.

Other objects of the invention will become apparent when the following description is read with reference to the accompanying drawings, in which:

FIGURE 1 is a plan view of the apparatus;

FIGURE 2 is one side evelation;

FIGURE 3 is the opposite side elevation;

FIGURE 4 is a section on the vertical plane indicated by line 4-4 of FIGURE 1, the terminal portion of the web of sheet material being shown adjacent to the location of the cutting means;

FIGURE 5 is the same as FIGURE 4, but shows the sheet material advanced still farther and the end thereof wrapped about the mandrel;

FIGURE 6 is the same as FIGURE 5, but shows the head of the apparatus in lowered position;

FIGURE 7 is the same 'as FIGURE 6, but shows the tube almost fully formed and the web of sheet material severed;

FIGURE 8 is a perspective view of a control switch and means for operating the same;

FIGURE 9 is an enlarged plan view, as indicated by line 99 of FIGURE 3;

FIGURE 10 is an enlarged front view of the head of the apparatus, as indicated by line ll-ltl of FIG- URE 3;

FIGURE 11 is an enlarged fragmentary plan view, as indicated by the line l11l of FIGURE 2;

FIGURE 12 is a fragmentary section on the vertical plane indicated by line 12--ll2 of FIGURE 4;

FIGURE 13 is an enlarged fragmentary section on the vertical plane indicated by line I3I3 of FIGURE 12;

FIGURE 14 is a fragmentary perspective view of the scraper device shown in FIGURES 12 and 13; and

FIGURE 15 is a wiring diagram.

Apparatus embodying the present invention comprises 3,ll2,@8d Patented Nov. 26, I963 a rigid floor-supported base structure having a main section It) and a section 12 to the rear of section 10 and tied thereto by an intermediate section 14.

Mounted upon a top surface I6 of section '10 are a pair of bearing units 18 and 19 secured by bolts 20. A tubular shaft 22 has opposite end portions journalled respectively in the units 18 and I9 and carries a front mandrel support roller 24. A second tubular shaft 26 also has opposite portions j-o-urnalled respectively in the units 18 and 19 and carries a rear mandrel support roller 28. Referring par icularly to FIGURE 9, mounted upon the shaft 22 is a gear 30 and mounted upon the shaft 26 is a gear 32. Iourn-alled in the unit 19 is one end portion of a stub shaft 3-4 and mounted upon this stub shaft is a gear 36 which meshes with the gears 30 and 32. It will be understood, of course, that the gears 3d and 32 do not mesh with one another.

Overlying the surface 16 of the base section It) is a plate 38 upon which are seated a pair of head frame bearings 4t) secured by bolts 42. Opposite end portions of a shaft 44 are journalled respectively in the bearings 4i) and have affixed thereto laterally spaced head frame arms 46. Corresponding fore end portions of the arms 46 carry a head rail 48, Referring particularly to FIGURE It depending from opposite end portions of this head rail respectively are brackets Stl and 52. A head roller 54 has opposite end portions journalled respectively in the brackets 59 and 52. Also depending from the head rail 43 are a number of brackets 56 each mounting a pair of laterally spaced short idler rollers 53 each engaging with the roller 54. Mounted upon one terminal portion of the head roller 54 is a gear 69 which meshes with an idler gear 62 mounted upon a stub shaft 64 journalled in the bracket 52. The gear 62 meshes with a gear 66, which latter gear and another gear, designated 68, are mounted upon a shaft '70 having opposite end portions journalled respectively in the bracket 52 and a bracket 72 affixed to the head rail 48.

At the foot of the machine is an electric motor and change speed unit 74 having mounted upon a drive shaft '76 a sprocket 78 about which is trained a chain 89. This chain is also trained about a sprocket 82 which is mounted upon the stub shaft 34. For taking up the slack in the chain 80 there is provided a sprocket 84 which is mounted upon a bracket 86. It will be evident that when the stub shaft 34 is rotated, the gear 36 turns the shafts 22 and 26 respectively through the gears 30 and 32. Mounted upon the shaft 26 is a sprocket S8 and trained about this sprocket is a chain 9%, which chain is also trained about a sprocket 92 suitably carried by the shaft 44. For taking up the slack in the chain 9%? there is provided an idler sprocket 94 carried by a bracket 96. Also suitably mounted upon the shaft 44 is a sprocket S S adapted to be driven by the sprocket 92 and about which is trained a chain Iiltl, the latter also being trained about the sprocket 68. For taking up the slack in the chain 10b there is provided an idler sprocket I62 carried by a bracket 1%.

Affixed to the shaft 44 is an arm res having pivotally connected thereto, as at 108, the rod 116 of a hydraulically actuated piston adapted to work in the cylinder 112. This cylinder is pivoted, as at 114, to a bracket 116 secured to the base section lltl.

Ioutrnalled in the bearing are the opposite end portions of a shaft I18 to which are secured the laterally spaced arms I21) of a cutter frame. Corresponding end portions of the arms I20 carry a cutter rail 122. A member 124- having a serrated cutting edge is secured by bolts 126 to the cutter rail 122. Each arm 46 is provided with a pivot 128 from which depends a link 39 having formed in a roller end portion thereof a slot I32 3 through which there extends a pin 134 mounted upon the corresponding arm 120 of the cutter frame.

Mounted upon the base section 1% area pair of brackets 136 secured by bolts 138. Iournalled in the brackets 136 are opposite end portions of a shaft 140, which shaft mounts a feed roller 142 and a pair of cams 144. Secured to this shaft is an arm 146 mounting a pivot 143 from which there depends a. rod 158 associated with a solenoid S1. Biasing the rod 156 upwardly is a tension spring 154. Each end of the rail 122 mounts a stop 156 secured by bolts 158. The one end of the stop Z456 is provided with a groove 160 which has seated therein the nose of the associated cam 144, rounded as at 162.

The brackets 136 have secured thereto respectively the opposite end portions of a stationary cutter bar 164 adapted for coaction with the movable cutter bar 12 Referring particularly to FIGURE 11, adjacent one end of the feed roller 142 is a slip clutch 166 and an associated gear 168 carried by the shaft 144. This gear meshes with a gear 17% mounted upon a stub shaft 171 having opposite end portions journalled respectively in the associated bracket 136 and a bracket 172. This bracket is secured to a channel bar 174 which in turn is secured to the base section 10. Slidably fitted in the channel bar 174 is a rack 1'76 meshing with the gear 17 ii and extending from the rod of a pneumatically operated piston working in a cylinder 178.

Carried by the shaft 118 are a pair of laterally spaced arms 182 of a holddown frame. The arms 182 carry a rail 184 and mount a hold-down roller 186 overlying the feed roller 142.

Secured to the base section are a bracket 18S and a bearing 1%, each of which has journalled therein a stub shaft 192 of a tensioning frame having end bars 194 and laterally spaced twister bars 196. The stub shaft 192 that is journalled in the bracket 18% mounts a pinion 193 which meshes with a rack 26% slidable in the bracket 112:3. This rack is attached to the rod 222 of a pneiunatically actuated piston which works in a pneumatic cylinder 2%, suitable stops being provided, as at 205 and 208, for limiting the excursion of the rack Extending from the cylinder 204 is a line 210 having connected therein a pressure-regulator device 212.

Pivotally connected to the shaft 4-4 is a switch support arm 214, the fore end portion of which is carried by a bar 216 extending upwardly from the associated bracket 136. Referring particularly to FIGURE 8, a pivot 218 at the upper end of the bar 216 mounts a collar 220 through which there extends an adjusting screw 222. The

lower end portion of this screw is threaded through a collar 224 which is pivotally connected to the arm 214. A switch MSl having an arm 23% is mounted upon the fore end portion of the arm 214. The head rail 48 carries switch arm actuating means, generally designated 232, in-

cluding a spring pressed element 23:? adapted for coaction with the arm 230 of the switch MSl.

Carried by the bar 216 is a pointer 236 coacting with a scale 238 scribed upon the arm 214.

For limiting the downward swinging movement of the head frame, the arms 46 are provided with brackets 24%) through which are threaded stop screws 24-2 adapted for coaction with the lower cutter bar 164. At the rear of the apparatus is a shaft 244, the opposite end portions of which are journalled respectively in a pair of bearings 246, which bearings are carried by the base section 12. The shaft 244 carries the supply roll of sheet material, designated 24-8.

Referring particularly to FIGURES 12, 13 and 14, associated with the roller 28 is a mechanism adapted for keeping the surface of the roller scraped clean. This mechanism includes a shaft 250 having opposite end portions journalled in suitable means carried by the base section 10 and having secured thereto a plurality of arms 252, corresponding end portions of which carry a bar 1. Slidably mounted upon the shaft 2% are a plurality of arms 256 having corresponding rear end portions affixed to a bar 258 which is notched, as at 260. The notched portion of this bar is fitted over an element 262 carried by an arm 263 which is secured to the rod 264 of a pneumatically actuated piston which works in a cylinder 266. The opposite end portion of the rod 264 is associ ated with a check mechanism 268. One end portion of each arm 256 is adapted to hold a scraper blade 270, the working edge of which engages the surface of the roller 28. The frame comprising the shaft 250, arms 252 and bar is biased by a tension spring 272 in a direction to press the edges of the scrapers 270 against the surface of the roller 23.

Referring particularly to FIGURE 15, electric power is supplied through main leads 280 and 282. The primary of a transformer T1, designated 233, the coil of a clutch C and a solenoid 51 are connected in parallel with each other and in series with the switch M51 across leads 8d and 282. The primary of a transformer T2, designated 285', is connected across leads 286 and 282. One end of the secondary of the transformer T1, designated 237, is grounded at G, and one end of the secondary of the transformer T2, designated 289, is grounded at G. The coils of a tensioning solenoid TBS associated with the air cylinder 294 and an interlock switch MS27 are connected in series between the other ends of the secondaries respectively of the transformers T1 and T2, and a lead 284 connected between the coils of the tensio-ning solenoid runs to ground at G. The coils of a paper feed solenoid PPS associated with the air cylinder 178 are connected in parallel between the high side of the secondary of transformer T2 and ground. A manual paper feed switch M and automatic paper feed switch M86 are connected respectively in the parallel branches in series with the respective coils of the paper feed switch PPS. The motor M and a switch SW1 are connected in series across the leads 230 and 282. Each coil of a solenoid SS associated with the pneumatic cylinder 266 is connected across the motor between the switch SW1 and lead 232.

In the operation of the apparatus the switch SW1 is closed, whereupon the motor operates continuously. However, at this time the clutch is not engaged and there fore the motor idles. The operator manually threads the web 243 between the twister bars 196, between the feed roller 142 and the overlying hold-down roller 186 and over the stationary cutter bar 164. Switch M85 is manually closed and then released. The associated coil of paper feed solenoid PPS is energized and the plunger is actuated to close paper feed switch M86, whereupon the associated coil is energized. When switch M85 is released, its associated coil is deenergized, but the coil associated with the switch M56 remains energized and holds switch M85 closed after switch M55 reopens. The valve which controls the supply of air to the cylinder 173 is controlled by a solenoid that is energized when the switch M56 is closed. The valve normally is in a neutral position, but when its solenoid is energized, the valve is operated to supply air to the cylinder 173 for advancing the rack 1.75. When the rack reaches the end of its excursion, the valve is automatically operated mechanically to supply air for return thereof to its initial position. As the rack approaches its initial position, the valve is automatically mechanically returned to neutral position and switch M56 is automatically mechanically reopened, whereupon the coil associated with the latter is deenergized. The rack 176 and gears 17% and 168 operate to turn the feed roller M2 and to advance the end of the web of sheet material to a position over the rollers 24 and 28. The slip clutch 166 allows return of the rack 176 and gears Fifi and 163 without actuation of the feed roller A. suitable pneumatic motor and solenoid controlled valve for use in feeding the sh ct material manufactured by The Bell ws Company, Akron, Ohio.

E9 The unit is known as a Bellows BMZ air cylinder unit with electro air valve.

A mandrel in the form of a bar 274- is placed over the end portion of the web of sheet material and the latter is then wrapped around the mandrel once with the mandrel supported on the rollers 24 and 28, as shown, see FIGURE 5.

A hydraulic pressure-control valve (not shown) is now manually operated to supply hydraulic pressure from a suitable source to the cylinder 112, whereupon the head frame swings downwardly and the head roller 54 engages the sheet material wrapped around the mandrel, see FIG- URE 6. As the head rail 43 descends, it automatically closes the switch M827, whereupon the on coil of the tensioning solenoid TBS is energized. The plunger of the solenoid actuates a valve to supply air to the cylinder 264 for turning the tensioning frame and tensioning the web of material. The switch MSi being open, the transformer T1 and the oif coil of the tensioning solenoid TBS are deenergized. In this connection it will be noted that the lead 284 shorts the secondary of the transformer T1 and the off coil of the tensioning solenoid out of the circuit. The rod 202 of the piston working in the cylinder 204 floats by reason of a constant fluid pressure being applied within the cylinder 204. The desired pressure is regulated at 212 and the stroke of the rod 22 is limited by the stops 2% and 208. In this way, irrespective of the drag due to the size of the supply roll, which varies as the sheet material is consumed, the tension on the section of sheet material extending from the supply roll to the feed roller M2 is maintained constant. A suitable pneumatic motor and control valve for operating the tensioning device is manufactured by The Bellows Company, Akron, Ohio, and is known as the Bellows EV Electroaire Valve, Model EVSB, and a suitable unit for use at 212 is manufactured by The Bellows Company, Akron, Ohio, and is known as the Lubro Control Unit, Model 55132.

The clutch is now operated manually and the motor turns the head roller 54 and the rollers 24 and 28 at the same surface speed and the tube is formed. When the tube is of a predetermined diameter, the switch MSl closes, switch M827 reopens and the motor is declutchedall automatically. Declutching causes the head roller 54 and the rollers 24 and 28 to cease operation. Closing of switch M81 and reopening of switch M527 causes deenergization of on coil of the tensioning solenoid TBS and energization of the off coil of the tensioning solenoid TBS. The tensioning device returns to its initial position, releasing the sheet material. Simultaneously, the paper cutoff solenoid S1 is energized, whereupon the cams 144 are withdrawn from under the cutter frame. The latter descends by its own weight and the cutter bar 124 coacting with the stationary cutter bar 164 severs the web of sheet material. Feed roller 142 and hold-down roller 186 retain the leading portion of the sheet material extending from the supply roll in its advanced position adjacent cutter bar 164. The plunger of the solenoid S1 is returned to its initial position by the tension of spring 154. It will be noted that the tensioning device returns to its initial position very shortly before the cutting operation takes place, and the latter operation takes place shortly before the clutch is operated.

By manipulating the adjusting screw 222 the fore end portion of the arm 214 and the switch M51 mounted thereon may be raised or lowered as required for actuation of the switch arm 23%) by the element 234 at the point in the cycle of the operation when the tube is of a predetermined diameter. To facilitate adjustment of the arm 214, the operator may observe the reading of pointer 236 on the scale 238.

Now the hydraulic pressure-control valve is manually operated to supply fluid pressure to the opposite end of the cylinder 112. The head rail is elevated, whereupon the switch MS]. is reopened automatically. Switch M81 is now open and the tensioning solenoid TBS is in neutral position. The motor, which is manually clutched and automatically declutched, as indicated hereinbefore, remains declutched. The cutter bar is elevated by the head rail and the supporting cams are returned to their initial positions by spring-pressure. The next cycle begins with the switch SW1 closed, but otherwise it is the same as just described.

When the switch SW1 is closed, one coil of the scraper solenoid SS is energized through a pair of closed contacts of the switch SW2. The plunger of the solenoid is actuated and valve is operated thereby to supply air to one end of cylinder 266. As the scraper device approaches the end of its excursion it opens the closed contacts of switch SW2 and closes a second pair of contacts, whereupon the first coil is deenergized and the second coil is energized. The plunger of the solenoid is again actuated and the valve is operated to supply air to the other end of the cylinder 266. As the scraper device approaches the end of its excursion in the opposite direction, it reopens the second pair of contacts and reoloses the first pair of contacts. Thus the scrapers move back and forth automatically and operate continuously to keep the surface of the roller 2? free from resins deposited from the sheet material. A satisfactory air cylinder for use at .266 is manufactured by The Bellows Company, Akron, Ohio, and is known as a BM-SC Series Air Cylinder, and a satisfactory check for use at 263 is manufactured by The Bellows Company, Akron, Ohio, and is known as the HC-l240 Hydro Check. it will be noted that during the operation of the machine, the rollers 24 and 23 are maintained in heated condition by steam supplied through the tubular shafts 22 and 26 and that the mandrel 274 is heated. As the sheet material passes over the roller 28, the softened res-ins form a coating on the surface of the roller which must be removed for proper operation of the apparatus.

it will be understood, of course, that the present invention, as shown and described, is susceptible of various changes and modifications which may be made without any departure from the general principles or real spirit of this invention. Accordingly, it is intended to claim the present invention broadly as well as specifically as indicated in the appended claims.

What is claimed is:

1. In apparatus for winding sheet material about a mandrel to form laminated tubular stock, the combination comprising means for revolvably mounting a supply roll of said sheet material, means adapted for serving as a cradle for said mandrel and a portion of said sheet material wrapped about said mandrel, said sheet material portion being the terminal portion of a section of sheet material drawn from said supply roll, a pressure roller adapted for engaging said sheet material portion and operable for turning said mandrel to draw sheet material from said supply roll and to wind it about said mandrel to form said laminated tubular stock, a pivotally mounted frame having said sheet material threaded therethrough, means for turning said frame about its pivotal axis including a fluid pressure motor adapted for app-lying a variable turning force upon said frame for maintaining said sheet material section uniformly tensioned, means operable for cutting said sheet material section, means (for maintaining said turning force upon said frame substantially from the time the winding operation begins to the time the cutting operation occurs, and means automatically responsive to a predetermined maximum outside diameter of said tubular stock for actuating said cutting means and terminating said winding operation.

2. in apparatus for winding sheet material about a mandrel to form laminated tubular stock, the combination comprising means for revolviably mounting a supply roll of said sheet material, means adapted for serving as a cradle for said mandrel and a portion of said sheet material wrapped about said mandrel, said sheet material portion being the terminal portion of a section of sheet material drawn from said supply roll, a pressure roller adapted for engaging said sheet material portion and operable for turning said mandrel to draw sheet material from said supply roll and to Wind it about said mandrel to form said laminated tubular stock, a pivotally mount-ed frame having said sheet material threaded therethrougli, means for turning said frame about its pivotal axis including a fluid pressure motor adapted for applying a variable turning force upon said frame for maintaining said sheet material section uniformly tensioned, fluid pressure regulating means, said fluid pressure motor being responsive to said pressure regulating means for maintaining a predetermined selected uniform tension on said web, means operable for cutting said sheet material section, means for maintaining said turning force upon said frame su'o stsntial'ly from the time the Winding operation beg-ins t0 the time the cutting operation occurs, and means automaticaliy responsive to a. predetermined maximum outside dian etcr of said tubular stock for actuating said cutting means and terminating said winding operation.

3. in apparatus for winding sheet material about a mandrel to form laminated tubular stock, the combination comprising means for revolvably mounting a supply roll of said sheet materia means adapted for serving as a cradle for said mandrel and a portion of said sheet material Wrapped about said mandrel, said sheet material portion being the terminal portion of a section of sheet material drawn from said supply roll, a pressure roller adapted for engaging said sheet material portion and op- S erable for turning said mandrel to craw shcet material from said supply roll and to wind it about said mandrel to form said laminated tubular stock, means operable for cutting said sheet material section, means automatically resonsive to a predetermined maximum outside diameter of said tubular stock for actuating said cutting means and tern -'ng said winding operation, and means operatively interposed between said cutting means and supply roil and operable in each cycle for automatically ceding said sheet material portion to the mandrel for eing wrapped thereabout and for holding said sheet material after said cutting means operates including a revolvable feed roller, rack and pinion means, and slip clutch means opcrativcly interposed between said fccd roller and rack and pinion means and means to reciprocate said rack.

References Cited in the file of this patent UNITED STATES PATENTS 1,680,979 Gardner Aug. 14, 1928 2,300,903 Broughton Nov. 3, 194-2 2,318,504 Lodding lay 4, 1943 2,621,736 Scruggs ct al. Dec. 16, 1952 2,676,764 Aulen Apr. 27, 1954 2,685517 Bartelson Aug. 3, 1954 2,830,775 Kiesel Apr. 15, 1958 2,845,231 Grettve July 29, 1958 2,939,645 Rowlands June 7, 1960 2,989,262 Horn'oostcl June 20, 1961 2,999,653 Ganz Sept. 12, 1961 

1. IN APPARATUS FOR WINDING SHEET MATERIAL ABOUT A MANDREL TO FORM LAMINATED TUBULAR STOCK, THE COMBINATION COMPRISING MEANS FOR REVOLVABLY MOUNTING A SUPPLY ROLL OF SAID SHEET MATERIAL, MEANS ADAPTED FOR SERVING AS A CRADLE FOR SAID MANDREL AND A PORTION OF SAID SHEET MATERIAL WRAPPED ABOUT SAID MANDREL, SAID SHEET MATERIAL PORTION BEING THE TERMINAL PORTION OF A SECTION OF SHEET MATERIAL DRAWN FROM SAID SUPPLY ROLL, A PRESSURE ROLLER ADAPTED FOR ENGAGING SAID SHEET MATERIAL PORTION AND OPERABLE FOR TURNING SAID MANDREL TO DRAW SHEET MATERIAL FROM SAID SUPPLY ROLL AND TO WIND IT ABOUT SAID MANDREL TO FORM SAID LAMINATED TUBULAR STOCK, A PIVOTALLY MOUNTED FRAME HAVING SAID SHEET MATERIAL THREADED THERETHROUGH, MEANS FOR TURNING SAID FRAME ABOUT ITS PIVOTAL AXIS INCLUDING A FLUID PRESSURE MOTOR ADAPTED FOR APPLYING A VARIABLE TURNING FORCE UPON SAID FRAME FOR MAINTAINING SAID SHEET MATERIAL SECTION UNIFORMLY TENSIONED, MEANS OPERABLE FOR CUTTING SAID SHEET MATERIAL SECTION, MEANS FOR MAINTAINING SAID TURNING FORCE UPON SAID FRAME SUBSTANTIALLY FROM THE TIME THE WINDING OPERATION BEGINS TO THE TIME THE CUTTING OPERATION OCCURS, AND MEANS AUTOMATICALLY RESPONSIVE TO A PREDETERMINED MAXIMUM OUTSIDE DIAMETER OF SAID TUBULAR STOCK FOR ACTUATING SAID CUTTING MEANS AND TERMINATING SAID WINDING OPERATION. 